摘要
针对姚桥煤矿现有采空区注浆材料防灭火材料覆盖密闭性差问题,通过氮吸附及扫描电子显微镜实验方法,研究了CO_(2)养护条件下不同钢渣水泥比时,材料养护7 d的水化产物和微观孔隙尺寸的演变。研究结果表明,在CO_(2)养护条件以及钢渣掺量下能够提升水泥水化进程,进而影响了水泥基材料孔隙结构的发育,材料等温线吸附曲线均为Ⅳ型;随着钢渣掺量的增加,其氮气吸附量、孔体积、比表面积均出现降低的现象;在SEM中还观察到,随着钢渣的掺入,水泥水化产物增多,进一步地填充孔隙结构,减少孔隙数量,改善钢渣水泥基材料的致密性,为利用CO_(2)养护技术改善钢渣水泥基材料性能提供了理论基础,为其在充填堵漏风工程实践中的应用提供了参考。
In response to the problem of poor sealing of existing grouting materials and fire prevention and extinguishing materials in the goaf of Yaoqiao Coal Mine,through nitrogen adsorption and scanning electron microscopy experimental methods,the evolution of hydration products and micro pore size of materials cured for 7 days in different steel slag cement ratios under CO_(2) curing condition is studied.The research results indicate that under CO_(2) curing condition and steel slag dosage,the hydration process of cement can be improved,which in turn affects the development of pore structures of cement-based materials.The isotherm adsorption curves of the materials are all of type Ⅳ;With the increase of steel slag dosage,there is a decrease phenonmenon occures in their nitrogen adsorption amount,pore volume,and specific surface area;In SEM,it is also observed that with the addition of steel slag,hydration products of cement increased,further filling pore structures,reducing the number of pores,and improving the compactness of steel slag cement-based materials.This provides theoretical basis for using CO_(2) curing technology to improve the performance of steel slag cement-based materials and provides reference for its application in filling and air leakage blocking engineering practice.
作者
张理想
郭永强
王南方
Zhang Lixiang;Guo Yongqiang;Wang Nanfang(Yaoqiao Coal Mine,Shanghai Datun Energy Co.,Ltd.,Xuzhou 221600,China)
出处
《山东煤炭科技》
2025年第2期185-190,共6页
Shandong Coal Science and Technology
关键词
CO_(2)养护
钢渣水泥基材料
微观结构
充填堵漏风
CO_(2)curing
steel slag cement-based material
microstructure
filling and air leakage blocking
